Slice potatoes lengthwise into ½” thick pieces. Turn and slice again lengthwise making large french fry type pieces. Place on cookie sheet lined with a silpat. Drizzle with oil to coat lightly. Toss with hands. Spread evenly over pan, then sprinkle with salt. Bake at 470° F for 20-40 minutes until light brown and crispy.
Optional: Sprinkle cheese over fries during the last few minutes of baking.